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Viking Wafer Map Format

November 17, 2020


We were provided this sample map file said to be a .vik wafer map. Further investigation showed it to be a binary file created by a company called Viking Semiconductor Equipement. Viking manufactured (among other things) KGD pick and place equipment in the 1990s.

hex editor view of .vik file

It appears that some other companies in that field also adopted the Viking wafer map format. This includes Zevatech, ESEC and possibly Royce.

Structure of the File

The file is broken up into two distinct sections:

The table below summarizes the parameters found in the header:

Description Notes
Date Code The date and some additional info (ASCII)
Tester ID ID of the testing machine (ASCII)
Lot ID wafer lot ID - should include wafer number
# of Ref Device may be none present max=16
Ref1 X position may be none present
Ref1 Y position may be none present
Ref2 X position may be none present
Ref2 Y position may be none present
Ref16 X position may be none present
Ref16 Y position may be none present
Units of Measure typically microns
Step Size X  
Step Size Y  
Column Count  
Row Count  
Null Bin  
Pick Die Count  
# Process Bins  
Process Bin Code  
Process Bin Qty  
Map Format default is 2D array
LL Origin quadrant
Flat Orientation  
Frame Orientation  
Process Status ASCII



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